View clinical trials related to Shock, Septic.
Filter by:Sepsis is an acute pathology defined as an inappropriate response of the host to infection, resulting in the onset of organ failure (Quick SOFA ≥2, or SOFA ≥2). Septic shock is a sepsis associated with an elevation of lactate ≥ 2 mmol / l and an arterial hypotension requiring vasoactive drugs. Several studies highlighted that sepsis is associated with a plasma L-arginine deficiency. This deficiency induces a lower availability of L-arginine for multiple metabolic pathways including those involved in the synthesis of nitric oxide (NO) in the vascular endothelium via NO synthase. NO is the main endogenous vasodilator mediator, a lower synthesis induces a vascular and endothelial dysfunction that can promote the occurrence of an organic dysfunction during sepsis. Decrease in available NO was confirmed in patients with sepsis and appears correlated with severity. L-arginine deficiency can have multiple origins: - L-arginine deficiency resulting from a decrease in endogenous production from citrulline synthesized by the enterocytes. Such enterocyte dysfunction has been confirmed in patients with sepsis and is characterized biologically by elevated plasma levels of I-FABP (intestinal fatty acid binding protein - enterocyte-specific protein, cytolysis marker) and lower than that of citrulline (hypocitrullinemia, marker of lower activity). - L-arginine deficiency may also result from a catabolism increase via arginase activity increased. This ubiquitous enzyme, having 2 isoforms (Arg1 and Arg2), allows the synthesis of urea and ornithine from L-arginine. An increase in arginase activity would decrease the available reserves of L-arginine for NO synthesis. The objectives of this work is to evaluate, in patients with severe sepsis or septic shock, the prognostic value of the plasma arginase activity and the plasma expression of 2 isoforms Arg1 and Arg2, their kinetics, and the link between activity / expression of arginase and enterocyte dysfunction.
Septic shock is a frequent complication associated with high mortality in patients with malignancies. The best transfusion strategy (restrictive or liberal) for the resuscitation of septic shock remains a controversial issue, in relation with potentially discrepant goals of tissue oxygenation and transfusion sparing. In this study, the investigators propose to address the efficacy of two RBC transfusion strategies (liberal or restrictive) in restoring appropriate tissue oxygenation as well as their tolerance. The investigators designed a prospective randomized multicenter trial aimed at comparing liberal and restrictive RBC transfusion strategies applied during the first 48 hours of resuscitation in cancer patients with septic shock and anemia.
Randomized, controlled, double blind clinical trial. Adult patients admitted to the ICU of the Hospital Español de México with a diagnosis of septic shock will be included. Patients will be randomized to one of the study groups: Intervention Group: Vitamin C 6 grams in 250 ml of 0.9% saline solution every 24 hours, in continuous infusion for 72 hours. Placebo Group: 0.9% saline solution 250 ml every 24 hours, in continuous infusion for 72 hours.
In the pre-hospital setting, the severity assessment of septic shock is essential to decide the optimal initial in-hospital level of care. As clinical signs can be faulted, there is a need for an additional element in order to enhance the severity assessment and to decide in-hospital admission in the intensive care unit (ICU) or in the emergency department (ED). Point of care medical device yielding blood lactate levels since the pre-hospital setting may give an easy and valuable element for the severity assessment and the decision-making. The aim of this study is to provide clinical evidence that the pre-hospital blood lactate level predicts the 30-day mortality of patients with septic shock.
In the emergency department (ED), the severity assessment of shock is a fundamental step prior to the admission in intensive care unit (ICU). As biomarkers are time consuming to evaluate severity of the micro and macro-circulation alteration, capillary refill time and skin mottling score are 2 simples, available clinical criteria validated to predict mortality in the ICU. The aim of this study is to provide clinical evidence that capillary refill time and skin mottling score assessed in the ED also predict ICU admission of patients with septic or haemorrhagic shock.
Preliminary studies show that giving a "cocktail" of intravenous vitamin C, vitamin B1, and steroids to critically ill patients with septic shock may dramatically improve mortality in those patients. These studies suffer from inadequate design due to lack of controls and blinding to prove the causal effect. Our goal is to conduct a prospective blinded randomized control trial to investigate whether this intervention truly effect outcomes.
This study aimed to investigate the effect of Glucocorticoid combined with vitamin C and vitamin B1 versus hydrocortisone alone on microcirculation in septic shock patients.
The pathophysiology of sepsis is characterized by the sudden onset of vasodilation and vascular permeability with capillary leakage. This leakage contributes to the development of generalized edema which is not clinically detectable below 4 litres but which becomes visible after a few days. The edema accumulates mainly at the subcutaneous level due to the high compliance of this tissue. Edema, and therefore hydrosodium overload, testifies to the severity of the inflammation. However, it could also be harmful in itself (affecting microcirculation and increasing mortality) as suggested by numerous clinical and experimental studies. The transfer of fluids between vascular and interstitial compartments during sepsis therefore has a central role in the pathophysiology of the disease and associated mortality. These transfers are mainly controlled at the microvascular level (with constant permeability) by the difference between capillary (CP) and interstitial (IP) pressures. In healthy subjects, subcutaneous IP is discreetly negative (-1 mmHg) and varies very little. On the other hand, a sometimes drastic decrease in IP has been described in various localized and systemic inflammatory situations. These pressure variations may be explained by the collagen structure of the interstitial tissue and a change in the three-dimensional conformation of these macromolecules induced by inflammation mediators. In an animal model of sepsis, a study showed significantly lower pressure in a group of animals in endotoxic shock. IP has never been measured in humans during sepsis. The objective of this study is to analyze subcutaneous IP (SCIP) in patients with septic shock compared with controls in order to evaluate the direct role of interstitial tissue in the onset of edema during sepsis.
The plethysmographic variation index (PVi) is a measure of the respiratory-induced variations in the plethysmographic waveform. Interestingly, in mechanically ventilated patients and under certain conditions, PVi may reflect fluid responsiveness (FR). Patients treated with high flow nasal cannula (HFNC), which has been described as a useful supportive therapy in spontaneously breathing patients with respiratory failure, may present the same hemodynamic changes, measured by transthoracic echocardiography, as those patients who are mechanically ventilated (MV). The hypothesis of the present study is that the PVi may predict FR in HFNC patients and, therefore, the objective is to investigate whether the PVi can predict FR in patients treated with HFNC.
Fluid therapy is an essential component of the management of patients with acute circulatory failure. Nevertheless, unnecessary administration of fluids in non-responders is harmful. Thus, the concept of fluid responsiveness has been suggested to guide fluid administration in critically ill patients to avoid either over or under-transfusion. The aim of this work is to investigate the ability of peripheral perfusion index to predict the hemodynamic response to mini-fluid challenge in patients with septic shock .